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Title: QCD and Light-Front Dynamics

Abstract

AdS/QCD, the correspondence between theories in a dilaton-modified five-dimensional anti-de Sitter space and confining field theories in physical space-time, provides a remarkable semiclassical model for hadron physics. Light-front holography allows hadronic amplitudes in the AdS fifth dimension to be mapped to frame-independent light-front wavefunctions of hadrons in physical space-time. The result is a single-variable light-front Schroedinger equation which determines the eigenspectrum and the light-front wavefunctions of hadrons for general spin and orbital angular momentum. The coordinate z in AdS space is uniquely identified with a Lorentz-invariant coordinate {zeta} which measures the separation of the constituents within a hadron at equal light-front time and determines the off-shell dynamics of the bound state wavefunctions as a function of the invariant mass of the constituents. The hadron eigenstates generally have components with different orbital angular momentum; e.g., the proton eigenstate in AdS/QCD with massless quarks has L = 0 and L = 1 light-front Fock components with equal probability. Higher Fock states with extra quark-anti quark pairs also arise. The soft-wall model also predicts the form of the nonperturbative effective coupling and its {beta}-function. The AdS/QCD model can be systematically improved by using its complete orthonormal solutions to diagonalize the full QCD light-frontmore » Hamiltonian or by applying the Lippmann-Schwinger method to systematically include QCD interaction terms. Some novel features of QCD are discussed, including the consequences of confinement for quark and gluon condensates. A method for computing the hadronization of quark and gluon jets at the amplitude level is outlined.« less

Authors:
;
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1002997
Report Number(s):
SLAC-PUB-14275
arXiv:1010.4962; TRN: US1100770
DOE Contract Number:  
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Conference: Invited talk at Light Cone 2010: Relativistic Hadronic and Particle Physics (LC2010), Valencia, Spain, 14-18 Jun 2010
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMPLITUDES; BOUND STATE; CONDENSATES; CONFINEMENT; DIMENSIONS; EIGENSTATES; FIELD THEORIES; GLUONS; HADRONS; HAMILTONIANS; HOLOGRAPHY; LIGHT CONE; ORBITAL ANGULAR MOMENTUM; PHYSICS; PROBABILITY; PROTONS; QUANTUM CHROMODYNAMICS; QUARKS; SCHROEDINGER EQUATION; SPIN; Phenomenology-HEP, Theory-HEP,HEPPH, HEPTH

Citation Formats

Brodsky, Stanley J, de Teramond, Guy F, and /SLAC /Southern Denmark U., CP3-Origins /Costa Rica U. QCD and Light-Front Dynamics. United States: N. p., 2011. Web.
Brodsky, Stanley J, de Teramond, Guy F, & /SLAC /Southern Denmark U., CP3-Origins /Costa Rica U. QCD and Light-Front Dynamics. United States.
Brodsky, Stanley J, de Teramond, Guy F, and /SLAC /Southern Denmark U., CP3-Origins /Costa Rica U. Mon . "QCD and Light-Front Dynamics". United States. https://www.osti.gov/servlets/purl/1002997.
@article{osti_1002997,
title = {QCD and Light-Front Dynamics},
author = {Brodsky, Stanley J and de Teramond, Guy F and /SLAC /Southern Denmark U., CP3-Origins /Costa Rica U.},
abstractNote = {AdS/QCD, the correspondence between theories in a dilaton-modified five-dimensional anti-de Sitter space and confining field theories in physical space-time, provides a remarkable semiclassical model for hadron physics. Light-front holography allows hadronic amplitudes in the AdS fifth dimension to be mapped to frame-independent light-front wavefunctions of hadrons in physical space-time. The result is a single-variable light-front Schroedinger equation which determines the eigenspectrum and the light-front wavefunctions of hadrons for general spin and orbital angular momentum. The coordinate z in AdS space is uniquely identified with a Lorentz-invariant coordinate {zeta} which measures the separation of the constituents within a hadron at equal light-front time and determines the off-shell dynamics of the bound state wavefunctions as a function of the invariant mass of the constituents. The hadron eigenstates generally have components with different orbital angular momentum; e.g., the proton eigenstate in AdS/QCD with massless quarks has L = 0 and L = 1 light-front Fock components with equal probability. Higher Fock states with extra quark-anti quark pairs also arise. The soft-wall model also predicts the form of the nonperturbative effective coupling and its {beta}-function. The AdS/QCD model can be systematically improved by using its complete orthonormal solutions to diagonalize the full QCD light-front Hamiltonian or by applying the Lippmann-Schwinger method to systematically include QCD interaction terms. Some novel features of QCD are discussed, including the consequences of confinement for quark and gluon condensates. A method for computing the hadronization of quark and gluon jets at the amplitude level is outlined.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {1}
}

Conference:
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